/*
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright © 2020 Keith Packard
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "stdio_private.h"

int __disable_sanitizer
__file_str_put_alloc(char c, FILE *stream)
{
	struct __file_str *sstream = (struct __file_str *) stream;
	if (sstream->pos == sstream->end) {
                size_t old_size = sstream->size;
                char *old = POINTER_MINUS(sstream->end, old_size);
                size_t new_size = old_size + 32;
                char *new;
                if (sstream->alloc)
                        new = realloc(old, new_size);
                else {
                        new = malloc(new_size);
                        if (new && old_size)
                                memcpy(new, old, old_size);
                }
		if (!new)
			return EOF;
		sstream->size = new_size;
                sstream->pos = new + old_size;
                sstream->end = new + new_size;
                sstream->alloc = true;
	}
	*sstream->pos++ = c;
	return (unsigned char) c;
}
